Muscles and joints

Question 1

Where do you have fixed joints?

Answer 1

In The skull

Question 2

Name two places in your body where you have hinge joints?

Answer 2

Elbow

-Knee

Question 3

Name two places in your body where you have ball and socket joints?

Answer 3

• Shoulder

- Hip joints

Question 4

Explain why tendons are not stretchy?

Answer 4

Tendons attach the muscle to bone therefore cannot let the muscle stretch to much during contraction.

Question 5

What are synovial joints?

Answer 5

Joints that are freely movable

Question 6

Describe the functions of :

Synovial memberane

Answer 6

it secretes synovial fluid.

Question 7

Describe the functions of Synovial fluid

Answer 7

It lubricates the joints.

Question 8

Describe the functions of Cartilage

Answer 8

it is Smooth and slippery to reduce friction between bones and also used during the growth of a child as it is ossified (turning it into bone)

Question 9

When you lift a heavy book, your biceps muscle exerts more force than the weight of the book.However,it enables you to lift the book through a large distance. Explain how it does this?

Answer 9

The elbow is the pivot point. The hand moves through a larger distance than the muscles. The muscles exert a larger force than the load that the hands lift.

Question 10

Give an example of a lever

Answer 10

When your arm bends and straightens it acts as a lever.